Controller.



wwd

L. L. TATUM,

CONTROLLER.

APPLIOATION FILED SEPT. 20,1911.

1,101,669,, Patented June 30,1914.

' ill llii i li llii LEWIS L. TATUM, OF MILWAUKEE,

orrlon.

WISCONSIN, ASSIGNOR TO THE CUTLER-HAMMER GUNTRQLLER.

fipecifics'lion of Letters Patent.

Patented June so. in A fspiilicziticn filed Sencember $343, 1913. Serial No. 650,312.

To all whom it may, concern:

Be it known that I, Lrnvis 'ixruas, a citizen of the Unitcd States. residi at lililwanhcc. in thc county of Milwaukee and State. Of Wisconsin have invsntcd now and useful Tm iroreincnls in Conirollcrs, which the iollo ine is a. full, clcar concise. and cxact dcscripi'ion, rcfcrcnce being; had lo the accompanying drawing, forming a part of this spccilicai'on.

My invention rclarcs to improves-acute circuit controllcrs.

it is parlicuiarly applicablc to couixroilcrs for moror Cllc'lllbk out is nor; rcs'rrictcdto Such application i'hcrcof.

In practicc ihcrc are many insiauccs as in tho case of motor drivcn ccniri'lirsral hydro cxiractors. u'hcre ii is important for the operator in rciuain in attcndancc i o' av period ai'lcr closurc oi "rho opiu'ai'ini cir cuii. so that he may bc on hand ii abnorma conditionsv arc incl: wii'h. in tho cas'i f contrifugral hydro cxiractors, it is essential to the safcty lhcrcoi ihai ihc material in ihc basket bc properly disiriburcd a oul iE miis so that whcu the baslrci; is brought up to a critical speed, it will revolve around its true. center and nos; vibrato. the material is not propcrly disiribulzcrh serious injury is liableto result. 'ihns, io insure saicty the dcvicc. it is highly iinpori'anc that i: operator shall remain in a t'cndancc unri the extracl or has rcachcci a. fair speed, s that ho mar immediately stop the driring; motor in the case that izhc desire is not properly balanced.

It is one of the objects of my provide a. controlling device, which iion co will compel tho attcndanrc of the. oocra mr until the desired condiiions obtain and automotr cally open circuit in the cvcni; that rho operator fails to remain in attendance until such time. I

My invention and advantages clearly explained.

For the purpose of disclosing shenaturo and charaeicristic fcaturcs oi? my invention, I shalldcscribe the (TOili'lUliiP diagrammatically illustratcd in tho accompanying drawingwrhich embodies my invcniion in onc form. It should be understood however that my invention is susccptiblc of cnibodh moot in various oihcr forms and of use in various dillcrcnt relations.

has Various other objects hercinaficr fully and sponds, closing the motor circuit.

I.he controller illuslraicd in the accompanying" drawing. is particularly applicable to uso in connection with motor driven ceutrifugal hydro cxtractors. it might howercr oe used in various other relations.

i or the purpose of illusl'ation, I have shown a motor 1 having mrarmature A, a s s field winding ii and a shunt field winding The motor is adaptcd to be supplicd with currcnis from lines L and L, tl'irough a m ntrolling dcvice which I shall nondcscrihc. This dcvicc. includes an clocaro r-: ;:ionsivc main swirch 2 for conrrolling The continuity oi tho motor circuit, the moior circuit including a iixcd resistance R for p'roicction of the motor. Of course in practicc. a variable resistance may be proridcd if dcsircd and suitable instrumentalitics also orovidcd for controlling the same. The opcralinr winding of the switch 2 is adapted to be controlled by push buttons 3 and 4. The button 3 is normally open and is adaptcd to bc closed to energize the swiich 2 to start the motor. The msh button i is normally closed and is :11 opted to be owned to dcncrgize the switch 2 to stop rho nio'tor. i

For mainfiaining the main switch energized afic thc rclcaso of the puslrbuiton 3, l. providc a switch 5, included in a shunt circuit around said push button 3. The swii'ch 5, is provided with an operating winding 6, connected in series with the motor armatiu'e, for a purpose hereinafter ole scribed. The shunt circuit includes an cconomizing; resistance 'T. In addition to rho switch 5, the shunt circuit includes another switch 8, connected to and operable with the main switch 2, whereby the shunt circuit is not closcd until the main switch is closed.

3' shall now describe the operation of the couirollcr at the/same time clearl setting forth the circuit connections there or. Tho motor circuit may be closed to start the motor by prcsaing push button 3.' This completes a circuit from main line L through push buti'on 3, by conductor 10, through push button 4-, by conductor 11, through oporaring winding of switch 2, by conductor l2 to main line L. Switch 2 thereupon re- The motor circuit current may be traced from main line L through switch 2 by conductor 1.3, through operating winding of relay saviich 5, by conductor 14, through the resistonce R, loy conductor 15, through motor armature, thence through the se i field winding F to line L". Closure of ti e switch also completes a circuit by cor; doctor 16, through the motor shunt fielci Winding f to line L. The motor is accord ingly set in operation, thereby se ting in motion the mechanism driven thereby. The *relav switch 5 is preferably so deslgood as r to pick up imu'iecliately upon the closure the motor circuit and to remain liited until the motor loos attained a precleteiuiin'. speed and there has been a con. determined drop in the eui-i'en the motorcireuit. Thus, preetie-lly, taneously, with the closure of the inain ing circuit by the auxilieiy contact. 8 oi? main switch said maintaining circuit, is opened at another point, by the switch 5. Accordingly, under such conditions, should the push button 3 be released, the switeli 2 would be cleuergized and disconnect the motor from circuit. Thus, while the relay switch 5 is up, it necessary to manually retain the push button in closed position to maintain the n'io'toi' in operation. lVllQl'l however, the motor has attained the desire l speed, causing a pi'e-(leterminecl drop in the flow of current in the motor circuit, the rela Y switch 5 will drop, closing the maintuiuin' eircuitot' the switch 2. This circuit extend. from main line L tl'xiougli said switch 2 and its auxiliary switch 8 by conductor 2?, through the relay switch 53. by conductor 18, through the resistance 7 0V conductor 13, through the closed push button l by eonductoi' ll, tlu'ougli the operating winding of switch 2 by conductor 12, main line L. This maintaining circuit; is shunt with the push button 3, so that the push button 3 may be now released without deei'iergizing the switch 2; It will/thus be i seen that until. the relay 5 drops to close tihe maintaining circuit. the starting pusli button must be manually maintained closed and that if the push button is released I'oei'ore the relay drops, the motor will be autolnatioally (liseonneoled from circuit. t will also be readily seen that this forms a very simple and ell'ective means for compelling the attendance of the operator the (lesii'od period alter initially sorting the motor-and tbal; by adjustment of the relay 5, the period during Willi-l1 tile pusli buttou i, must be maintained closed, may be varied at will. To stop the molm', it is only necessary to press the pusli button -l. which being normally closed and being im-luded in die maintaining circuit. opens said maintaining cir euit, thereby doi norgizing the switch 2 and disconnecting the motor from circuit.

lVhat l (-laim as new uud desire to secure by Letters Patent, isz

1. In combiuulion, an oleetro'respoosive dovioe. o o 'vileli operable to cause \iee to respond but lending ubon i-elmised to deenei'gize said devil-e. and olwu-o-i'esponsive 1110111155 for pi'ewmiug aid switch room clei nel' iziug said *lll lW bui Hlkl. ltoting. manual retention of uid :-'\\il(l1 for o. temporary period al'ler the response of mid device.

2. ln eoiubiualiou. an ilQUllO-l'lHPOHSlYC translating device. a. S\\'ll.(ll operable to cause id device lo be energized but leading to :olui'n to a position to mum) said doviee to be leiuiei'gized, and. electmwespou- "-'-l-ll'.ll i'es -.';-n." i'o to the (ll lll(;ll (ou ."i iii the vii-cultof said translating delue to prevoul said su'ii'i'b from de fnoi'gizlug s'id device but ueoe sitadiugr manual retention of said SWllcll until pi'edotermiued ElQLl'ilCill eoudili'ous are osl'ullllsliod iu the (llillli' of said ti-anslaling deviee.

3. l1 iliuil'iullui' for oleiti'io motors. in eoiubiuaeion, a manually opm'aled su'itvll fol slai'liugd e motor. said su'ilob lending to move to iouition to stop lbo motor, and means ope vino; autmuulii-ally to render said lllkllllfllfl to stop the motor but muuuul retention of said predelez'mizuul period ul'loi' {be os-z bee started to compel the alteudtlie open; tor for such a period.

a controller for electric motors, in c-ou'ibioatiou, a. switch operable to start the motor but feuding when released to slop the motor, and electi'o-i'espousive moans adapted to prevent said swiioli from stopping llle motoi' but ueeessituliug muuuul retention of said swllel'i uui'il predetermined electrieal conditions are established in the motor.

la a controller li'oi' elevli'io motors, in oombluutlon, a switch operable to start the motor but tending to move to a position to op the some, and uutomatie means for pre venting; said switch from stopping the mofor but .necesulvaliug manual retention of said swilzeli until the motor. attains a predetermined speed.

6. lo a controller for electric motors, in oombiuation, a. swilvlx operable to slart the motor but lending when released to stop llzl': motor, and oleeti'o-xospolisive means for preventing said switch from sioppiug the u'mtoi but; ell eotivo only alloy the motor has attained o. pz'edotoi'miued speed.

7. lo eombiualiou, a. motor. a manual switeli. oonli'olliugtlie eonlinuity of {be circuit of said motor and lending, to move to a position towause the motor circuit to be interrupted and. oleotro-respousi\o means having an operating winding: in series with tbo motor, to prevent, said switch from ('auslug: iniex'i'uption of be motor circuit but u-ovossilatiug manual retention of said switch for a temporary period a'l'ler the motoy is started.

fl. in combination. :2 motor, a manual coni-ol su'itelz therefor operable to start said ant-e o 4- l2 stop the same,

motor but tending to move to a position to and an electro-responsive switch responsive to the electrical condition in the motor circuit for short-circuitin said manual switch but onl after the esta lishment of predetermine electrical conditions whereby the manual retention of said switch is' necessitated for a temporary period-after the motor is started.

9. In combination, a motor, a manual switch controlling the continuity of the circuit of said motor'and tending when released to cause the interruption thereof, a shunt circuit around said switch, and an electro-responsive relay controlling said shunt circuit, said relay having its operating winding connected in series with the motor. 10. In a controller for electric motors, the combination with the 'motor circuit, of an electro responsive switch controlling the continuity thereof, a manual switch for energizing said electro-responsive switch but tending, when released to de'iinergize the same, amaiiitaining circuit for said electrores onsiveswitch and a relay switch insaid maintaining" circuit having an operating winding connected in'said motor circuit.

11. In a controller for electric motors, the combination with the motor circuit, of an electro rcsponsive switch controllin continuity thereof, a manual 7 switc for the energizing said electro-responsive tending when released to deiinergiu' tll'b same, a maintaining circuit for'said'ele'ctrn res onsive switch, and a relayswitch'in and maintaining circuit relay responding upon circuitltc o 11 said rna taining circuit and reclosin 0 same only after a predetermined ecrease of current in the motor circuit.

12. In a controller for electric motors, the combination" with the motor circuit, of an electro-responsive switch controlling the continuity thereof, a controlling switch for said elect-ro-responsive switch tending to stand in a position to deenergize the same, a maintaining circuit for said electro-resgonsive switch including contacts actuated y said electro-responsive switch, and a relay switch in said maintaining circuit having an operating winding connected in the motor circuit.

In witness whereof, I have hereunto sub,-

sc'ribed my name in the presence of two witnes'ses. t v

I p LEWIS,'L. TATUIL. Witnesses" F. HfHUmR I Wan-rim E; SARGENT,

as having an opera a winding connected in and motor circuit, sci

closure of the motor 

